This seems to be a popular fan on here. Had mine since about 2018. QUESTION: On my 06, should this efan have 2 speeds? The thread describes a low and a high which explains the 1500-4500 CFM variance. I only get one speed even while climbing a mountain at 7000 ft elevation and coolant temps at 225 in 100 degree weather. Certainly doesn't sound anything close to 4500 cfm. Runs the same speed as when it just switches on for the AC which I am assuming is low. Am I missing something here or does it just run one speed no matter the coolant temp and that's it? If you have personal experience with one, let me know. Thank you!